Safety hook



March 29,1927. 1,622,971

G. N. PORTER SAFETY n'oox Filed July 21; 1926 z Sheets-sh t 1 'yz/j 2.

difforte- INVENTOR WITNESS: ATTORNEY March 29, 1927. 1,622,971

' G. N. PORTER 2 Sheets-Skieet 2 9 2 z mm ,4 a

A, w a

Filed July 2-1. 1926 Patented Mar. 29, 1927.

GEoeGE-Nswmmmm; o'F'o ILTo'N, oktAHoivtA.

SAFETY 'i'roox.

This invention relates to hooks adapted for any and all uses for whichsuch a' devibe is capabletlie object of the invention residing in anovel construction of means whereby the object with which the hook isused is automatically locked associated therewithyantl removed from thehook when thelbckihg means is released.

In carrying out the invention, I contemplate the use of a pivotedlocking dog designed to receive t he object with which the hook is used,and autoi'ha'tically move the (log to an active position to prevent theobject from being casually separated from the hook'under any conditions,with means for releasing' and' returrilhg' the locking dog toitsnormal'pos'ition, during which operationof the dogthe object isdisengaged from the hook. I p

The nature and adva'i'itages of the imo'ntion Willbe betteruntlerst-obtl when the follo ing detail description is readin'con'nection W 'h the accompanying drawingsfthe ijrx' 'eii tionresidingin theconstruction, combinatioh" and ai'i'rangeinent of parts asclaiined.

Tn the drakviligs rentingate of this apilicati'on like nuiiierii lsreference indicate similar 'Ja'rts in the several vi e'ws'an,d"\tliere-- in: p p Figure 1 is a side elev'at'ioh ofthe hookshowing" the active "and inactive positions of the l ockingdbgl F 7 re 2is 'a' similar Vieivtvi'th ohefside l1ook 1-eino\ -e'clto show newthe-locking (tog and it soprati'ng nl'ezl'iis is arranged Within thehook.

Figure fi' is a view siihilarftok Figure with th'r roth'r side of thehook"reihoi etl to show the other side of the dog andthe lot-li'npjhneans therefor. 4 v Figured isa s'ect'ioiialviewon line l t ofFigured I j V Figure 5 is an edge elevation otthe hook.

The hook is prferably made"n3 in two halves or sections inclicatethat Tend 11 respectively and these sections are held to ether 'b' a'nysuitable fastening means such as bolts or the like indicated at 12. Eachsection is formed to provide the bill 13 of the hook, While the adjacentor confronting sides of the respective sections are recessed 1926.Serial No. 124;027.

as shown in Figure 4 to accommodate the movable parts of the device tobe hereinafter described. Each section of the.hook has a reducedsemi-cylindrical threaded extension 14, which when the sections areassociated accommodate a nut 15 utilized to hold a collar 16 mountedon'the shaft of the hook and upon Which collar is swivelly or rotatablymounted a yoke or the-like 17. This structure is clearly illustrated inFigmes-1 and 2.

Pivoted between the'sections of the hook is a locking dogl8,the latterbeing pivoted at 19,'and cut away to provide a substantially U-shapedopening orportion' 20 which normally occupies the'position-illustratedby full lines in Figures 1' and'2; Int-his p0- eition oft-he locking dogthe cutaway or Lt-shaped portion is arranged, inthe mouth of thebill',sothatthe object to be associated \vit-hthe hook is -received by this U-'sl1aped or cut away portion 20. Pivoted to one side of thelo'cki'ndot; 18 is a link 2-1 which is capable of sliding movementlongitudinally of the'hook; a'nd' has onezehd connected to the adjacentend of a coil spring 22; the ot-iier end orw11ic11nis-fixedas at 23 to'the shank of the hook. This spring 23" together with the linlr21functions to hold the locking dog-in its normal position as justmentioned, and Whcnthelocking dog is swung to -lts activefpositi o'nillustrated by dotted limesin Figures 1 and-'2,

placed under tension. The locking dog is moved to its activepositi'on'by the object incidentt-o -the association off-theobject'ivitl'i the bill of the hook as will' bereadily"under--s'tood,'the active position of t'l ielocking dog;

hem-g suchas to completely close the bi ll.

of the hook in a manner to prevent casual separation of the object fromthe latter under any and allcirciims'tances. I

Pivote'd on the' other side of the'l'ocking deg is a" locking bar 2 stwhich is also mounted for sliding movement longitudinally of the shankof' thehook, and adapted to reposeupon 'a shoulder '25 formed on one ofthe sections, when thedockin-g dog'ls in its "active position, and holdsa'i'd dog in this position until such times as it 1s I desired torelease thesame. The loWer end of this lockin'g'bar is sl i'ghtlyo'ifset as at 26 to properly engage the adjacent Wall of the recess inwhich the locking dog operates as clearly illustrated in Figure 3, thelocking bar being subject to the influence of a the spring 23 is,

spring 27 which bears against one side of the bar 24 to force it in thedirection of the locking shoulder 25. When the locking dog is in itsnormal position, the locking ha 24: occupies the position shown bydotted lines in Figure 8, wherein it will be noted that the lower end ofthe bar is spaced from and beneath the shoulder 25. However when thelocking dog is swung upon its pivot 19 to its active position, thelocking bar is moved with the dog, until the lower end .ot the bar ispositioned adjacent the shoulder 25, whereupon the spring 27 moves thelocking bar to its position upon said shoulder, thereby holding thelocking dog against moven'icnt while in its active position.

\Vhile any suitable means may be employed to effect a release of the dog18, 1 preferably make use of a thumb engaging plate 28 which is pivotedupon the shank of the hook as at 29, while projecting from the plate 28is a short plunger 30 operating within an opening 31 in the adjacen'uside of the shank and contacting the locking bar 2% when the latter isin the position shown by full lines in Figure 3. Consequently to releasethe locking dog it is only necessary to press upon the plate 28,whereupon the plunger 30 forces the bar 24 oil the shoulder 25, at whichtime the spring 23 is Called into use to automatically return thelocking dog to its normal position. During this movement of the dog, theobject associated therewith is separated from the hook by being movedwith the dog through the opening in the bill of the hook.

While it is believed that from the foregoing description, the nalure andadvanof the invention will be readily apparent, I desire to have itunderstood, that I do not limit myself to what is herein shown anddescribed and ihat such changes may be resorted to when desired as fallwithin the scope of what is claimed.

li hat is claimed is:

l. in co111hi11at.io.n, a hook, a dog pivoted thereon and having aU-shaped portion, resilient means for normally holding the dogpositioned with its U-shaped portion in the mouth of the hook andadapted to be moved to a position to close said hook incident to theassociation of an object with the latter, a shoulder formed on the shankof the hook, a pivoted locking rod carried by said dog and adapted torepose upon the shoulder to hold the dog in its adjusted position, meansfor moving the bar on said shoulder as the dog is moved to its adjustedposition, and means for etl'ecting a release of said locking bar toallow the dog to automatically return to its normal position under theinfluence of said resilient means.

2. In combination, a hook, a locking dog pivoted thereon and including aU-shaped portion, resilient means for normally holding the dogpositioned with its U-shaped portion in the mouth of the hook andadapted to be moved to a position to close said hook incident to theassociation of an object with the latter, a locking bar pivoted on saiddog and movable therewith, a shoulder formed on the hook and resilientmeans for moving said locking bar on to said shoulder with theadjustment oi said dog, whereby the latter is held immovable in itsadjusted position, a pivoted plate, and a plungr-a' projecting from theplate to effect a release of d locking bar when said plate is depressed,thereby allowing said dog to automatically return to its normal positionun- 3a.: the influence ot said resilient means.

3. In combination, a hook comprising two 111L111 anion sections, meansfor connecting said sections together, the adjacent sides of saidsections having recesses formed therein, a locking dog pivoted betweensaid sections and having a U-shaped portion, resilient means fornormally holding the dog positioned with its U-shaped portion in themouth of the hook and adapted to he moved to a position to close saidhook incident to the association of an object with the latter,cooperating means carried by Said dog and hook for holding the dogimmovable in its adjusted position, said means operating between ihesections of said hook, and means including a pivoted thumb engagingplate for effecting a release of said dog and allow its automatic returnto normal position by said resilient means.

i. In con'ibination, a hook including a bill, a locking dog pivotedthereon and having a U-shaped portion, a link pivotally connected withsaid dog and arranged for moven'ient longitudinally of the shank of thehook, a spring connecting one end of the dog with said shank andoperating to normally hold the dog positioned with its U-shaped portionin the mouth of the hook, said dog being adapted to be moved to aposition to close the hook incident to the association of an object withthe latter, a shoulder formed on the shank of the hook, a pivotedlocking rod carried by said dog, means for moving said rod on saidshoulder the dog is moved to its active position, and thumb actuatedmeans for eii'eciing a release of said dog to permit it toauton'iatically return to its normal position.

In testimony whereof I aliix my signature.

GEORGE NElV'lON PORTER.

Hill

